Fix Issue 111: support mobile keyboard input in terminal

[mapache-tools-github-connector]

Description

This PR resolves issue #111 by adding robust mobile and virtual keyboard support in the Cloud Terminal component.

Details

• Detects mobile browsers via UserAgent in the terminal page.
• For mobile devices, it uses standard xterm-helper-textarea styling (including to prevent automatic zoom on mobile browsers, positive width/height, and standard alignment) to ensure the virtual keyboard / IME works correctly.
• Disables aggressive input/keydown/keyup clearing listeners on mobile, which previously interfered with IME composition states and prevented any input from being entered.
• Maintains the existing strict helper-textarea styles on desktop, preserving the fix for Issue 97.
• Added and updated tests in to cover the mobile logic.

Resolves #111.

[github-actions]

Visit the preview URL for this PR (updated for commit 928efe2):

https://pi-agents-cloud--pr120-mapache-111-ms8jigkf-tazq74nc.web.app

_{(expires Tue, 07 Jul 2026 16:44:43 GMT)}

_{🔥 via Firebase Hosting GitHub Action 🌎}

_{Sign: ad3a3866d5dcd316f5eca68b23f0ce7295063677}